Algebra II Discriminant

1 The discriminant is

• aX² + bX + c

• b - 4ac

• b² - 4ac

• b² + 4ac

1 What does the discriminant tell us?

• The maximum or minimum

• The y-intercept

• The number and type of solutions

• The axis of symmetry

2 For the function below, is the discriminant positive, negative, or zero?

y = x² + 4x + 4

• Positive

• Negative

• Zero

2 A function has a discriminant of 4.

How many x-intercepts does it have?

• 0

• 1

• 2

• 4

2 A function has a discriminant of 0.

How many x-intercepts does it have?

• 0

• 1

• 2

• 5

3 What is the discriminant of

-2x² − x − 1 = 0 ?

• 76

• -7

• 9

• none of these

3 For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

3 For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

Determine the values of a, b, and c for the quadratic equation:  4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

For the function below, is the discriminant positive, negative, or zero?

___________

y = x² + 4x + 4

• Positive

• Negative

• Zero

• Not Sure